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习题练习：Physics Unit17: Electric Potential
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 作者: admin  发布日期: 2022-08-15 14:49    总分: 75分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月15日 14:49  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following ;kf1 ;2yvafz80j p7q)eu izrnis not a vector?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomba8e;4pw9 l v+8wy,8pnuvv clz is a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objects are insulated from their 5-m7aztrlcny xne)/ ca . *,zcsurroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is atnxe ,l57c/ca zz t-c. amny*)r a higher potential?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For a proton moving in the direc4djyc,q2 okn:q8vc 2v/1rn zz0u rts2tion of the electric field

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For an electron moving in a direc t3 tz)af-z- ywhq(ff0c ;, 2at5dxqojtion opposite to the electric field

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons are placed on a hollow conductin9r mj5uaya ej76sr w60g sphere. They

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A small charged ball is acceleh2kpz)3 n6sv5 u.xitx x2k;zgrated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 205zx; xpskhz gtk nxuv2.36i) 200 V, what will the new speed of the ball be?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A surface on which all points are at the same potential is rewikv/a4pz 2t35pn.c.p5h7 p0bygl 1,c plir wferred to as

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A negative charge is moved from point A to point 1jtht2a zd *1 gtt/w tsehi)98B along an equipotential surfacgsh tt )ei/t1 wh2t8*1adjzt9e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must*hbfp 7 tg+j6s be

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy acquired by a particle carrying a charge equal to that on tfkpg/ach 4(w01+ 0nag l:gfquhe electron as a result of moving through a potential difference of one volt uf f(lgc qg4 01gk :pa+hn0w/ais referred to as

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electron-volt is aidm ;)m8dhl. a unit of

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correst+fz1os4u we6ponds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at a distance of 2.0 m from a6y7ln j,9kbj.u zjh*wm:yn55n8opqh positive point charge is 100 V. What is the absolute potential 4.0 m away from th*:,6hbjz5hk u8y n 9w .nlojj5myqp7 ne same point charge?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potenti esz)zp*3eyr8ll)( o qal at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0l 8z 3y s)r*o)qelezp( m away from the same point charge?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the exact center of a square id;r2e sa92kwo 0sppvl4r,x t;s 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of tr;dw2vt o9ax 02 srkp4el,;sphe other corners is also filled with a charge of +Q?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the center of a square is 3.0 V wzyf -)-zaxgp0 hen a charge of +Q is locap)f- zyg 0-axzted at one of the square's corners. What is the absolute potential at the square's center when a second
charge of -Q is placed at one of the remaining corners?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electric dipoles always co 0mia8qsow5q *4 (rgfe5 -ga24hk fo(rq wou0fnsist of two charges that are

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per volt o. i3 uiwu30ty1n 7chdis a

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capacitors are identical i4wkpy o:f 61cqn every respect except that one has twice the plate areocw: qy4f p16ka of the other. If the smaller capacitor has capacitance C, the larger one has capacitance

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor hanaqw kwvb(nm,) 5-v0l s a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capqnv- 5w0b(n) km vl,awacitance?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A battery charges a parallel-plate capacit qa8vmc8t, ;zq h+u/6pi5zldyor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difference between the plates as they are being separayq ,8uq tp/c5 m d6ah8+zlvz;ited?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric field between the plates of a given capacitor is;.3jgaeon rukq0 n(9s2-gii: v 9wea e weakened, the capron (ae9:2n eu9-igaqiw0 ;sv3eg.k jacitance of that capacitor

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintained with constant voltage byt6xzz4hrssm8dj5 0 n1 a battery as they are pulled apart. During this process, the amount of charge on 8z54r htz d0s6n1sxmj the plates must

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel c /o nm2hoan-.q- vvj+*wx i9hzqsa93-plate capacitor are maintained with constant voltage by a battery as they are pullediwc sq.m3qv x*vnzn -/-a 2+oah9hj9o apart. What happens to the strength of the electric field during this process?

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26#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State three reasons for addinasws tq*p 4d7: lp4yc09 zif-pg a dielectric material between the plates of a capaciw-97ypdi4zsppa q:0t4f * clstor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as paper is placed betw2 gte8s;s16q 5fohk+k9f olb feen the plates of a capacitor. Wf1 9 f8sqkb2fghe5s6; kt o+olhat happens to the capacitance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as paper is placed be;q ch0asv+ l+bb42wr otween the plates of a capacitor holding a fixed cbosc2rbv4 lh+a+ 0w;q harge. What happens to the electric field between the plates?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacidr4ut56;hc1*s rf mz ;;q1: edmy tyhctor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the pl1q uytm1d5e c* mtf6;rhrzcsyd; ;4:hates is increased in such a way that no charge leaks off. The energy stored in this capacitor has

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the capacitance w*/y3 py;wxgj of a capacitor holding a constant charge causes the energy stojy/; wxwy*p3 gred in that capacitor to

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the voltage across a given capacitor/ji)7 ecku rh; causes the energy stored in that capacitorr /hu)7ij;ekc to

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  It takes 50 J of energy to move 10 C of charge frh.w j41rx kln*ym/x u7ahb./bom point A to point B. What is the potentiall jbahux*yrhxb71. m4wk/.n/ difference between points A and B?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The net work done in moving an electron from point A, whls( la bh ekg:e(rsc-*)n +4isere the potential is -50 V, to ponb:(aese-k4g (l s hsr+l* )ciint B, where the potential is +50 V, is

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at repl :eifvu)k0v 1ugp)+st, is accelerated through an electric potential difference of 500 V. What is the ki :k)ug +ppuvf1ve )0linetic energy of the proton?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at rest, is accelerated through an electric potentia wxmbn xc/nfc93(;dqz/o h6f0l difference of 500 V. Wh9/6cwxno0mz/b3fc x;qdh(n f at is the speed of the proton?

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Starting from rest, a proton falls through a potential differenboos*/8nfpm( )kr f)i ce of 1200 V. What speed does *b(f fmok 8)npsro/i) it acquire?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much work does 9.0 V do in moving+uaio vti51gt5gy90g $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron is accelerated thf836 n35f)a (wbgznfp f/h7cwcs im:xrough a potential difference of 500 V. What is the velocity of tfw(b8 /37fzpn)5h:fmgx6 n si3 cfa cwhe electron afterward?

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-g object carries a charge of 20 mC. The object is accelerated from restzv9kjanh5rl15 12ub m through a potential difference, and afterward the ball is moving at 2.0 m/s1m 21j5la rz9hbk5unv. What is the magnitude of the potential difference?

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-V battery maintains the electrical potential difference beb 8aame/8acy/8:)jh)p ng3t +vi ihni tween two parallel metal plates separated by 1.0 mm. What i8/gc3nntj8 h+m:ea8 i yibih/v p)aa)s the electric field between the plates?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A uniform electric field, with a magnitude of 500 V/m, is directed parallel to 8*p.wqe9lq eu the +x axis. If the potential at x = 5.0 m is 25009wpeqq.l u*8e V, what is the potential at x = 2.0 m?

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C directed towardr; prinyv1tg m m6.a6- the east. If the voltage measuredvpg y6 rn1.miam6 tr;- relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west of that point?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton moves 0.10 m along the direction of an electric field j0m1lmzyzw w5*n x(;nof magnitude 3.0 V/m. What is the change in kinet jm n mx;51w(*yl0zznwic energy of the proton?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by 0.20 m, are connected to a 12-V battc6(ncf tcav )z;0/ tat s)e:ha9vekx3ery. An electron released from rest at a location 0.10 m from the negative plate. When the electron ahscaat0;a kev6/ :t x evf))3cnz9t(crrives at a distance 1.50 m from the positive plate, what is the potential difference between the initial and final points?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, s +f*h7kg mqmg7eparated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When thm+g7 hm q7fk*ge electron arrives at a distance 0.050 m from the positive plate, how much kinetic energy does the electron gain?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by )nr-0 gv*a18aievq gl e*anm;0.20 m, are connected to a 12-V battery. An electron released from rest at a locat)e qagmlr *-av *g;evni810naion 0.10 m from the negative plate. When the electron arrives at a distance 0.050 m from the positive plate, what is the speed of the electron?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C directed t9 sntn;sk. 9qmoward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the volta.9;t n9nqs mksge at a point 1.0 m directly east of the point?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C directed d 8sc sc-m4:zou3b+d ctoward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m directlyb3c c+4z cd-d8 ouss:m south of that point?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a Cu2+ ion drops through a potential difference of 12 V, it 0iy ;np pwp,dh0iu1o9will acquire a kinetic energy (in the absence of friction)1 php0i0wopd yiu;,n9 of

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential at a 9is j l,k 6-uj/q9wdjydistance of $5.0 \times 10^{-10} \; m$ from a nucleus of charge +50e?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two 3.00-mC charges are at the ends of a meter stick.sj36lv 0 g4j/,pkjgczs)9rqp Find the electrical potential for the center of the me4lg3q9 sj6s,kzj)rvgpp/c j0 ter stick.

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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.1wp dip zkf57:0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at:i7kwf 15zdpp infinity, what is the electric potential at point (0, 4.0 m)?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2n+tfqxc;0 ) dk.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge a)nx+qcft ;kd0 t point (0, 4.0 m)?

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.0emyfc( *v59 )dcah p9ijb 2z.b-nC charge is at (3.0 m, 0). If the potential is takz5p)d2*9i.(v9ec cmfhb ab yjen to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to point (0, 4.0 m)?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Four charges of equal charge +q are placed at the corners of a rectanseprsv p bvy/tdy063h(2+ svg(+hs449x k dgogle of sides a and b. What is the potentih+ 6 spt d2y/(rbvok40xses vd+hgg3v(yp s49 al at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0 cm?

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A square is 1.0 m on a sidsbj: rg u/td+)e. Charges of +4.0 mC are placed in two diagonally opposite co/ bg:s)jt dr+urners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the square's center?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (charge +2e, mass s47uzj1jrrj ;gql:2v wzi-hx .-;p bb$6.64 \times 10^{-27} \; kg$) moves head-on at a fixed gold nucleus (charge +79e). If the distance of closest approach is $2.0 \times 10^{-10} \; m$, what was the initial speed of the alpha particle?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is necessary toma :w0 wzy gm :vm6gr,o.gct)/ place three charges, each of 2.0 mC, at the corners of an equilaterm yvw,0 6gm: tczrmg )woa.:g/al triangle of side 2.0 cm?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What charge appears 1ce, tei k5p7ron the plates of a 2.0-mF capacitor when it is charged to 100 V?cir k15pe7, et

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has plates of wz31sjt 1gtio jl(tb0b418 xq7 .fhbsarea $0.50 \; m^{2}$ separated by a distance of 2.0 mm. What is this capacitor's capacitance?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is filled with air, and the plates are separated by k3l8 wx 7x(jzvvo )k 2*pesi:a0.050 mm. If the c2 7w*:3j vlkk8ipvex) s oxa(zapacitance is 17.3 pF, what is the plate area?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has plates ow2ff1fxex s u)+f wq6z;4f1tsf area $0.20 \; m^{2}$ separated by a distance of 1.0 mm. What is the strength of the electric field between these plates when this capacitor is connected to a 6.0-V battery?

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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has a plate separation of 5.0 cqv )un:r(.gx tpoo7n-m. If the potential difference between the plates is 2000 V, with the top plate at thep.v:(xt - 7oonrqngu ) higher potential, what is the electric field between the plates?

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-mF air capacitor is connectedi w1spx;j3adf 0oxesk .y;9h8 across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = x3yx e j;9kd;s.10ofiaws ph8 4.5). How much additional charge flows from the battery, which remained connected during the process?

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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 60 mC is placed on a 15 mzb9cyo1u( ffo0 /m: ahF capacitor. How much energy is stored in the capacitou mf( ahco:fy/9b 1o0zr?

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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  20 V is placed across a 15 mF capacitor. What is the energy stored in th,/ 8cgvgd:t7wkj,bp oe capacig,/,b8 o: gt7wjv pckdtor?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 2.00 mC flows onto the plates of a capacfm 6a+*gyg/l*b 4/cehql 2fvcitor when it is connected to a 12.0-V battery.b vgql*+/6g/2cm yahffc4le * How much work was done in charging this capacitor?

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a 10-mF capacitor is charged so that,s 5oz 9 vvdc:4-itkxk it stores $2.0 \times 10^{-3} \; J$ of energy, what is the voltage across it?

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacs8fobtgbyk00pf))j u tv ep ),+v 83gwitor consists of plates of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the capacitance?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of plates of arewsj,xl3 n -3iwws;kk(5r dt9mi,s(gja $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the charge on the plates?

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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of pvq9n:be1m4h hn e fr84lates of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the electric field between the plates?

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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructed with plate zgm o7;q4tx v3area of $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much charge is stored on it when it is charged to a potential difference of 12 V?

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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructed with plate area ofue9kr 9+h67sdveb e(p $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much energy is stored when it is charged to a potential difference of 12 V?

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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected to a 50-V battery and becomes fully charged :g2ajqjrpws;f7/( c l. The battery is removed and a slab of dielectric that completely fills the space between the platesr/: fq7 (;l2cjasp wjg is inserted. If the dielectric has a dielectric constant of 5.0, what is the capacitance of the capacitor after the slab is inserted?

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75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected to bqffokpm*jw-n6xoc(:6o 5 7o a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the-pxbonq*ocfo f m6 5j6:(kow7 space between the plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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